Yahoo mail downloading attachments: super slow

Slow as molasses: downloading attachments.

As I write this, I’m still waiting (5+ minutes) for eM Client to download a 5MB attachment from Yahoo via smtp. The green bar is going as slow as a turtle and it says “preparing”

I have a 1GB internet connection and when I go my Yahoo Mail via website, download is instant.
Screenshot 2022-08-21 000312